An Iterative Image Encryption Research Based on the Dyadic Displacement and Linear Feedback Shift Register in Discrete Wavelet Domain
| Autor: | Chien-Ming Su, 蘇建銘 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 In recent years, due to explosive development of Internet technology, a great deal of multimedia (images, sounds, videos, etc.) data message is delivering on internet. But in the process how we ensure the security of such information, it has become a problem of concern to the people. At present, image encryption technologies are gaining more and more attentions for researchers. Since the digital images can be transmitted through the Internet, it indirectly generate images safety issues. Image encryption is a way that can ensure the safety of image. However, the traditional encryption methods cannot satisfy image due to big quantity. According to the characteristic of image, researchers produce a variety of image encryption methods. A novel iterative image encryption scheme using the image dyadic displacement, the linear feedback shift registers and discrete wavelet transform in the cascading way is proposed to defeat the disadvantages of the conventional image encryption. Multi-keys are used in the proposed scheme to promote the security level of the image encryption. Furthermore, the results of the simulations show that the decrypted image is a picture filled with noises and hardly to be identified if any key used in the decryption process is wrong. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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